While lobsters can regenerate their claws, and many lizards can regrow their tails, humans and other mammals have notably poor limb regeneration abilities. The notion that such an "animal" ability could somehow be transferred to people has been a part of science fiction since its early years. A good example of this is Romeo Poole's 1926 short story "A Hand from the Deep", which has a Doctor Whitby experimenting with crayfish extracts on an unsuspecting patient:

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"The theory is nothing very new. As early as 1906 it was observed that when a limb is amputated at the middle of a bone, the bone starts to grow out again, but increases only about one-fiftieth of an inch in length before it is halted by some other influence. You know also, of course, about the little warts of so-called ‘proud flesh' that apparently try to replace the original muscular tissue in case of injuries, but which are misshapen or misplaced. What Whitby was trying to get at, as I see it, was to so control these misdirected efforts of nature as to produce a new and perfect limb.
"The human body is already able to repair damaged bones by rebuilding small particles of the bony tissue; it is also able to replace muscle, nerve and even finger-nail tissue, although in somewhat imperfect forms. Whitby was trying to induce it to build a lost member in perfect form.
[...]
"It seems that Whitby has been experimenting for years with the ductless and other glands of shellfish in pursuance of this theory of regeneration, and we have upstairs the living proof that he was able to prepare a glandular extract that changes the bodily cell-structure as well as influencing the building-up processes of nature; but it appears that he near succeeded in isolating the one influence from the other, both being present in his preparation.

Of course there are terrible side effects to the treatment; quite improbably the patient starts turning into a crustacean himself. Later science fiction tales usually assume as a matter of course that "autodocs" and other advanced medical treatment technology will make limb regeneration almost routine procedure, albeit often a slow and painful one.

Are there aspects of limb regeneration that haven't been fully fictionally explored? What would be the implications if all ordinary people had that kind of wound healing ability for society and medicine? The wound healing ability in axolotls has also allowed scientists to surgically induce the formation of extra limbs. What if humans had that ability as well?